پژوهشنامه حمل و نقل

پژوهشنامه حمل و نقل

بهینه‌سازی رفتار رئولوژیکی و عملکرد قیر لاستیکی اصلاح‌شده در شرایط اقلیمی متنوع

نوع مقاله : مقاله پژوهشی

نویسندگان
سینا حاتمی 1
امیر امینی 2
رضا سلیمانی 3
محمد محمدزاده 4
1 دانش آموخته کارشناسی ارشد، دانشکده مهندسی شیمی - مهندسی فرآیند، دانشگاه سیستان و بلوچستان، زاهدان، ایران
2 گروه مهندسی عمران، واحد نجف آباد، دانشگاه آزاد اسلامی، نجف آباد، ایران
3 دانش آموخته دکتری، دانشکده مهندسی شیمی، دانشگاه تهران، تهران، ایران
4 دانش آموخته کارشناسی، دانشکده مهندسی شیمی، دانشگاه آزاده واحد قشم، قشم، ایران
10.22034/tri.2026.568373.3424
چکیده
محدود بودن مطالعات موجود در زمینه بررسی اثرات هم‌زمان اصلاح‌کننده‌های پودر لاستیک بازیافتی (CRM)، روغن موتور مستعمل (WEO) و اسید پلی‌فسفریک (PPA) موجب ایجاد خلأ علمی در طراحی قیرها و روسازی‌های آسفالتی با عملکرد بالا، صرفه اقتصادی و پایداری زیست‌محیطی شده است. ازاین‌رو، پژوهش حاضر با هدف ارزیابی اثر ترکیبی این سه افزودنی بر خواص رئولوژیکی و عملکردی قیر نیمه‌سنتزی انجام شد. نتایج نشان داد که ویسکوزیته قیر به‌طور قابل توجهی تحت تأثیر درصد WEO قرار دارد؛ به‌گونه‌ای که افزایش مقدار WEO منجر به کاهش ویسکوزیته و بهبود کارایی اختلاط، پمپاژ و پخش قیر می‌شود، در حالی‌که افزایش درصد CRM باعث افزایش ویسکوزیته و ارتقای مقاومت قیر در دماهای بالا و شرایط بارگذاری سنگین می‌گردد. نتایج حاصل از آزمون‌های MSCR و LAS حاکی از آن است که ایجاد تعادل بهینه بین CRM و WEO می‌تواند به‌طور هم‌زمان مقاومت قیر در برابر شیارشدگی و طول عمر خستگی آن را به‌صورت معناداری بهبود بخشد. بر اساس تحلیل نتایج، سه سناریوی بهینه برای طراحی قیر اصلاح‌شده پیشنهاد شد: (۱) ترکیب CRM برابر با ۲۵٪ و WEO برابر با ۱۵٪ به‌منظور کنترل ویسکوزیته در محدوده مجاز استاندارد؛ (۲) ترکیب CRM برابر با ۲۵٪ و WEO برابر با ۱۷٫۵٪ برای بهبود کارایی اجرایی و کاهش ویسکوزیته؛ و (۳) ترکیب CRM برابر با ۱۸٫۶٪ و WEO برابر با ۱۵٪ به‌منظور افزایش مقاومت قیر در دماهای بالا و تحت ترافیک سنگین. در مجموع، نتایج این پژوهش راهکاری علمی، کاربردی و پایدار برای بهبود دوام، عملکرد و سازگاری زیست‌محیطی روسازی‌های آسفالتی ارائه می‌دهد.
کلیدواژه‌ها
قیر لاستیکی اصلاح شده
عملکرد دمایی
مقاومت عملکردی
قیر گرم لاستیکی
بهینه سازی عملکردی
موضوعات

عنوان مقاله English

Optimization of the Rheological Behavior and Performance of Modified Rubberized Asphalt Binder under Diverse Climatic Conditions

نویسندگان English

Sina Hatami 1
Amir Amini 2
Reza Soleimani Morghamaleki 3
Mohammad Mohammadzadeh 4
1 M.Sc., Grad., in Chemical Engineering, University of Sistan and Baluchestan, Zahedan, Iran.
2 Department of Civil Engineering, Na.C, Islamic Azad University, Najafabad, Iran.
3 Ph.D., Student, Chemical Engineering, University of Tehran, Tehran, Iran.
4 B.Sc., Grad., Chemical Engineering, Qeshm Branch, Islamic Azad University, Qeshm, Iran.
چکیده English

The limited number of existing studies investigating the simultaneous effects of crumb rubber modifier (CRM), waste engine oil (WEO), and polyphosphoric acid (PPA) has resulted in a significant knowledge gap in the design of high-performance, cost-effective, and environmentally sustainable asphalt binders and pavements. Accordingly, this study aims to evaluate the combined influence of these modifiers on the rheological and performance-related properties of a semi-synthetic asphalt binder. Key performance indicators, including viscosity, rutting resistance, fatigue behavior, and temperature-dependent performance, were systematically investigated. The results indicate that binder viscosity is strongly influenced by the WEO content; increasing WEO significantly reduces viscosity, thereby improving mixing, pumping, and workability characteristics. In contrast, higher CRM contents lead to increased viscosity and enhanced resistance to high-temperature deformation under heavy traffic loading conditions. Findings from the MSCR and LAS tests demonstrate that an optimal balance between CRM and WEO can simultaneously improve rutting resistance and fatigue life of the modified binder in a statistically significant manner. Analysis of variance (ANOVA) further reveals that although WEO exhibits a stronger individual effect on binder properties than CRM, the interaction between these two modifiers plays a critical role in regulating the overall performance behavior of the asphalt binder. Based on the comprehensive analysis, three optimal design scenarios were identified: (i) CRM = 25% and WEO = 15% to maintain viscosity within standard allowable limits; (ii) CRM = 25% and WEO = 17.5% to enhance workability through reduced viscosity; and (iii) CRM = 18.6% and WEO = 15% to improve high-temperature performance and resistance under heavy traffic conditions. Overall, the findings of this study provide a scientifically sound, practical, and sustainable approach for enhancing the durability, performance, and environmental compatibility of asphalt pavements, making it suitable for applications under diverse climatic conditions and high traffic demands.

کلیدواژه‌ها English

Modified rubberized asphalt binder
Thermal performance
Performance resistance
Warm rubberized asphalt
Performance-based optimization
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پژوهشنامه حمل و نقل
دوره 23، شماره 3
پاییز 1405
صفحه 73-90